[llvm] r336333 - [X86][SSE] Add extra v16i16 shl x,c -> pmullw test

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Thu Jul  5 02:54:53 2018
New Revision: 336333

URL: http://llvm.org/viewvc/llvm-project?rev=336333&view=rev
Log:
[X86][SSE] Add extra v16i16 shl x,c -> pmullw test

We want to compare shifts with repeated vs non-repeated v8i16 shuffle masks (for PBLENDW ymm) 

Modified:
    llvm/trunk/test/CodeGen/X86/lower-vec-shift.ll

Modified: llvm/trunk/test/CodeGen/X86/lower-vec-shift.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/lower-vec-shift.ll?rev=336333&r1=336332&r2=336333&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/lower-vec-shift.ll (original)
+++ llvm/trunk/test/CodeGen/X86/lower-vec-shift.ll Thu Jul  5 02:54:53 2018
@@ -255,6 +255,8 @@ define <8 x i32> @test10(<8 x i32>* %a)
   ret <8 x i32> %ashr
 }
 
+; test11 vs test12 - show difference between v16i16 that is repeated/non-repeated at v8i16 level (for PBLENDW masks).
+
 define <16 x i16> @test11(<16 x i16> %a) {
 ; SSE-LABEL: test11:
 ; SSE:       # %bb.0:
@@ -277,3 +279,28 @@ define <16 x i16> @test11(<16 x i16> %a)
   %lshr = shl <16 x i16> %a, <i16 1, i16 3, i16 1, i16 1, i16 1, i16 3, i16 3, i16 3, i16 3, i16 3, i16 3, i16 1, i16 1, i16 1, i16 3, i16 1>
   ret <16 x i16> %lshr
 }
+
+define <16 x i16> @test12(<16 x i16> %a) {
+; SSE-LABEL: test12:
+; SSE:       # %bb.0:
+; SSE-NEXT:    movdqa {{.*#+}} xmm2 = [2,8,2,2,2,8,8,8]
+; SSE-NEXT:    pmullw %xmm2, %xmm0
+; SSE-NEXT:    pmullw %xmm2, %xmm1
+; SSE-NEXT:    retq
+;
+; AVX1-LABEL: test12:
+; AVX1:       # %bb.0:
+; AVX1-NEXT:    vextractf128 $1, %ymm0, %xmm1
+; AVX1-NEXT:    vmovdqa {{.*#+}} xmm2 = [2,8,2,2,2,8,8,8]
+; AVX1-NEXT:    vpmullw %xmm2, %xmm1, %xmm1
+; AVX1-NEXT:    vpmullw %xmm2, %xmm0, %xmm0
+; AVX1-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
+; AVX1-NEXT:    retq
+;
+; AVX2-LABEL: test12:
+; AVX2:       # %bb.0:
+; AVX2-NEXT:    vpmullw {{.*}}(%rip), %ymm0, %ymm0
+; AVX2-NEXT:    retq
+  %lshr = shl <16 x i16> %a, <i16 1, i16 3, i16 1, i16 1, i16 1, i16 3, i16 3, i16 3, i16 1, i16 3, i16 1, i16 1, i16 1, i16 3, i16 3, i16 3>
+  ret <16 x i16> %lshr
+}